<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>

<body>
  <script>
    // 接口地址: http://www.liulongbin.top:3006/api/formdata
    // 请求方式： POST

    const fd =new FormData()
    fd.append('uname','zs')
    fd.append('age',12)
    // 1. 创建 FormData 实例

    // 2. 调用 append 函数，向 fd 中追加数据
    const xhr = new XMLHttpRequest()
    xhr.open('POST','http://www.liulongbin.top:3006/api/formdata')
    xhr.send(fd)
    xhr.onreadystatechange =function(){
      if (xhr.readyState===4 &&xhr.status===200) {
        console.log(JSON.parse(xhr.responseText));
      }
    }

  </script>
</body>

</html>